So, I've had the same Directv account 30+ years.
I can't remember exactly, but I think I signed up for Paramount+ directly thru their website, mainly for UFC content. The annual plan is less than $12/month.
Another thread here on Reddit was talking about having it for free on Directv, so I looked. Sure enough, I have it for free bundled with Showtime for free until November 3rd, then it's $13.99/mo.
I use a smart TV in the bedroom and have been accessing Paramount+ thru the tv. I use a non-smart projector in the living room and have been accessing Paramount+ by connecting to my laptop.
How do I access paramount+ thru my Directv DVR?
Is content access the same as thru the Paramount+ app?